US 11,757,365 B2
Dynamic transient control in resonant converters
Rubinic Jaksa, Markham (CA)
Assigned to MURATA MANUFACTURING CO., LTD., Kyoto (JP)
Appl. No. 17/275,000
Filed by Murata Manufacturing Co., Ltd., Nagaokakyo (JP)
PCT Filed Sep. 6, 2019, PCT No. PCT/US2019/049844
§ 371(c)(1), (2) Date Mar. 10, 2021,
PCT Pub. No. WO2020/055669, PCT Pub. Date Mar. 19, 2020.
Claims priority of provisional application 62/730,152, filed on Sep. 12, 2018.
Prior Publication US 2022/0060120 A1, Feb. 24, 2022
Int. Cl. H02M 3/335 (2006.01); H02M 1/00 (2006.01); H02M 1/08 (2006.01)
CPC H02M 3/33592 (2013.01) [H02M 1/0058 (2021.05); H02M 1/08 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A converter comprising:
a switching stage including first and second primary transistors;
a resonant stage connected to the switching stage;
a transformer including a primary winding connected to the resonant stage and a secondary winding;
a rectifying stage connected to the secondary winding of the transformer and including first and second synchronous rectifiers; and
a controller configured and/or programmed to operate in:
a steady-state mode in which an output voltage of the converter is regulated by varying a switching frequency of the first and second primary transistors and of the first and second synchronous rectifiers; and
a synchronous-rectification control mode in which the output voltage of the converter is regulated when an output-voltage overshoot is detected by switching the first and second primary transistors and the first and second synchronous rectifiers at a fixed switching frequency and by varying a duty cycle of the first and second synchronous rectifiers.